July 2017
Beginner to intermediate
464 pages
10h 38m
Korean
Content preview from 러닝 자바스크립트: ES6로 제대로 입문하는 모던 자바스크립트 웹 개발
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163
5
장
표현식과 연산자
수적인 작업입니다.
let
a
=
5
,
b
=
10
;
[
a
,
b
] = [
b
,
a
];
a
; //
10
b
; //
5
배열 해체는 꼭 배열에만 사용할 수 있는 것은 아닙니다.
9
장에서 배울 이터러블 객체에는 모두 사
용할 수 있습니다.
여기서 살펴본 간단한 예제 정도라면 굳이 해체를 사용하지 않고 그냥 변수에 값을 직접 할당
하는 게 더 편했을 겁니다. 해체의 진가는 다른 곳에서 가져온 객체나 배열에서 원하는 요소를
뽑아내야 할 때 드러납니다.
6
장에서 그런 예제를 살펴보겠습니다.
5.11
객체와 배열 연산자
객체와 배열, 함수에는 특별한 연산자가 있습니다. 점 연산자 (
.
)와 대괄호 연산자(
[]
)는 이미
봤고, 나머지 연산자들은
6
장과
8
장,
9
장에서 설명합니다. 하지만 이 장은 연산자에 관한 장이
니 간단히 요약하고 넘어가겠습니다. [표
5
-
10
]을 보십시오.
표
5-10
객체와 배열 연산자
연산자 설명 설명하는 장
. 점 연산자
3
장
[] 대괄호 연산자
3
장
in
프로퍼티 존재 연산자
9
장
new
객체 인스턴스화 연산자
9
장
instanceof
프로토타입 체인 테스트 연산자
9
장
... 확산 연산자
6
장,
8
장
delete
삭제 연산자
3
장
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.